Identification of polymers in waste tyre reinforcing fibre by thermal analysis and pyrolysis

Abstract

The composition of the reinforcing fibre obtained from the recycling of scrap tyres was analyzed with a view to finding the most suitable applications for it. The material (RF) was separated into two different parts i.e. fibre (F) and microfibre (MF) to ensure the maximum homogeneity of the material under study. Thermogravimetric analysis (TG) together with differential scanning calorimetry (DSC) and infrared spectroscopy (FTIR) were used to identify the polymers present in the waste and to determine in what proportions they were present. Determination of the temperatures of maximum volatile matter evolution (Tmax), the yield at the end of the pyrolysis and the melting temperatures yielded very useful results for the identification of the polymers. In order to confirm the results obtained, pyrolysis of the pure polymers was carried out and the decomposition products were analysed. The results were then compared with the oil composition data derived from the pyrolysis of the waste fibres. Our results showed the presence of two polyamides, rayon, polyester and aramid.

A review on thermal and catalytic pyrolysis of plastic solid waste (PSW)

“…Pyrolysis has been investigated on a number of scales, ranging from micro experimental setups that are typically aimed at studying the degradation kinetics and the properties of the materials in thermogravimetry (Park et al, 2000a;Acevedo et al, 2015;Thumsorn et al, 2012;Al-Salem et al, 2009a;Bockhorn et al, 1999a) or in pilot and semi-industrial scales that can handle hefty proportions of solid waste (Tukker et al, 1999;Muller-Hagedorn and Bockhorn, 2007;Al-Salem et al, 2009b, Mastral et al, 2007a, Undri et al, 2014. Pyrolysis treatment processes typically consist of a feeding section, that normally handles the feedstock material which requires almost no pre-treatment, reactor unit assembly, and product collection vessels that contain separation lines for the products based on their chemical properties.…”

Mechanical properties of composite material reinforced with textile waste from the process of tyres recycling

“…The textile waste contains a certain amount of rubber that can be separated with difficulties (Acevedo et al 2015). A great part of impurities in form of the rubber granulate were removed from the textile waste used for experiments.…”

“…The European legislation established the following preferential order of the environment-friendly management with respect to the waste material: reduction, reuse, recycling and energy production (Acevedo et al 2015). The waste reduction (or prevention) is the preferred approach to the waste management because waste that is not created forestalls the waste management costs.…”

“…A principle of the ecological liquidation of tyres is a separation of their parts (a material separation) (Fang et al 2000;Dadfar, Ghadami 2013;Ferreira et al 2013). Rubber granulate, metal waste and textile waste are products of the mechanical process of the waste tyres recycling (Knapčíková et al 2014;Acevedo et al 2015).…”

Influence of Processing Parameters on the Tensile Strength of PA-W/mLLDPE Composite Films Produced by Blown Film Extrusion

“…The volumes of plastic wastes are increasing day by day, requiring effective recycling processes of different kinds of materials in a cost-efficient way [1]. Polyamide (PA) or nylon is one of the most common plastics used in food packaging.…”